INA199: INA199

Hi Ian,

what is "DRV199 reference schematic"?

Kai

Excuse typo, is INA199.

Thanks, Ian.

Ian,

I'm with Kai. I'm still confused. Are you looking at the TINA SPICE model, the schematic from the INA199 EVM? The images posted did not come through either. 

Second, you ask about using a fixed load, are you talking about using a load to set a DC current through the shunt resistor? I need some detail into what your asking here to be able to help. 

Hi Guys,

Here is customer schematic,

G517 is power switch.

IN-. IN+ will be DC input, LOAD is fix.

is it make sense get o/p waveform as below? 

Thanks, Ian.

Hi Guys,

We take away output capacitor,

Change output capacitor to 1nF,

Others information, the waveform will only DC if I using external power supply to INA199 supply voltage.

But real application power will not so clear as power supply.

Can I say above waveform is correct in real application?

Thanks, Ian.

Ian, would it be possible to get scope shots of the output as well as the corresponding input that is leading to this? If the customer can, I'd like them to probe directly at the IN+ and IN- pins, not at the shunt. 

Also, can the customer share if there is anything else connected downstream on the output? What else does 'CSM' interface with on the board?

Hi Carolus,

I will send you mail to discuss offline due to will shows customer schematic.

Thanks, Ian.